Hello Aspirant

The eligibility criteria for JEE Main (Joint Entrance Examination Main) can vary slightly from year to year, but generally, the following requirements are in place:

Academic Qualifications:

Must have passed Class 10 or equivalent with at least 60% aggregate marks. Must be appearing for Class 12 or have passed Class 12 with Physics, Chemistry, and Mathematics as compulsory subjects.

Since you failed your 12th Physics, there might be some issues related to it but as far as I know you can take the compartment exam for Physics and still be eligible for JEE Main.

Even if you fail in one subject in Class 12, you can still appear for the compartment exam and attempt to improve your score. If you pass the compartment exam, you will be considered eligible for JEE Main. Inform your school about your failure in Physics and inquire about the process for appearing in the compartment exam

Hope this helps